QEMU

  1. Bug #1399191
  2. Comment #1

Comment 1 for bug 1399191

Revision history for this message
Stefan Hajnoczi (stefanha) wrote : Re: [Qemu-devel] [Bug 1399191] [NEW] Large VHDX image size

On Thu, Dec 04, 2014 at 01:31:38PM -0000, AMULYA L wrote:
> Public bug reported:
>
> We are trying to convert a VMDK image to VHDX image for deploy to HyperV Server ( SCVMM 2012 SP1) using qemu-img.
> We tried converting the image using both 'fixed' as well as 'dynamic' format. We found that both the disks occupy the same size of 50GB. When the same is done with VHD image, we found that the dynamic disks are much lesser in size (5 GB) than the fixed disk (50GB).
>
> Why is that the VHDX generates large sized images for both the formats?
>
> The following commands were used to convert the vmdk image to VHDX
> format

Jeff, did you fix this recently in commit
85b712c9d5b873562c864e72f69cbf0d87d2fe40 ("block: vhdx - set
.bdrv_has_zero_init to bdrv_has_zero_init_1")?

Stefan